Add a way to pass parameters to functions that isn't a fixed argument order

[webvictim]

Currently you can define functions in Force like ReleaseTeleportContainer := func(teleportVersion string, gitRepo string, os string, arch string) {}

This is good for small numbers of parameters but would quickly get messy with 5+ parameters needed for a function. Also, as Go doesn't support optional function parameters or overloading there isn't a simple way to make this tidier.

Maybe there could be a way to define a struct and then pass that to a function (very rough example):

TeleportReleaseArgs := struct(
  // teleportVersion is the Teleport version to release
  {Name: "teleportVersion", Type: String},
  // gitRepo is the Git repo to use
  {Name: "gitRepo", Type: String},
  // os is the operating system to build for
  {Name: "os", Type: String},
  // arch is the architecture to build for
  {Name: "arch", Type: String, default: "linux"},
  // runtime is the runtime to build for
  {Name: "runtime", Type: String, Optional: true},
)

ReleaseTeleportContainer := func(args TeleportReleaseArgs) {}

Key parts are:

• needs a way to define a default for a given parameter
• needs a way to make parameters optional

(there are possibly arguments for wanting to build/define some kind of custom type system for validation too, but I think to start with the standard Int, String and Bool types would work)